From LIDAR data towards HBIM for energy analysis


Díaz-Vilariño, Lucía; Boguslawski, Pawel; Azenha, Miguel; Mahdjoubi, Lamine; Lourenço, Paulo B.; Arias, Pedro

Knowledge about heritage buildings and structures is interesting for a wide variety of stakeholders,ranging from architects to operators or the public administration. Such knowledge includes a largevariety of physical and functional characteristics of the building. Laser scanning allows efficient andaccurate 3D digitalization of heritage sites and subsequent data processing towards the creation ofgeometrically and semantically rich models.Parameterization and semantic enrichment of heritage building representations towards the creationof Heritage Building Information Models (HBIM) generally involves the use of point cloudsand images as templates for manual mapping procedures in commercial software. Indeed, the informationto include in BIM models depends on the requirements of the application it is intended toserve. In view of that, the applications presented in this chapter pertain to automated techniquesthat were implemented to parameterize point clouds towards models suitable for energy analysispurposes.The challenge in automating the reconstruction of heritage buildings is to deal with their geometricalcomplexity and irregularity, meaning that the methodologies selected should be robust andefficient under these conditions. The resulting 3D semantically rich model enhances the knowledgeof the heritage building, complementing other representations of the facility such as point clouds orhandmade HBIM. The procedure is implemented and validated in a real case study: the Ducal Palacein Guimarães (Portugal).